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Skulpt is a Javascript implementation of Python 2.x. Python that runs in your browser!
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<!DOCTYPE html>
<html>
<!--
Copyright 2008 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.testing.ExpectedFailures</title>
<script src="../base.js"></script>
<script>
  goog.require('goog.testing.ExpectedFailures');
  goog.require('goog.testing.jsunit');
</script>
</head>
<body>
<script type="text/javascript">
  var count, expectedFailures, lastLevel, lastMessage;

  // Stub out the logger.
  goog.testing.ExpectedFailures.prototype.logger_.log = function(level,
      message) {
    lastLevel = level;
    lastMessage = message;
    count++;
  };

  function setUp() {
    expectedFailures = new goog.testing.ExpectedFailures();
    count = 0;
    lastLevel = lastMessage = '';
  }

  // Individual test methods.

  function testNoExpectedFailure() {
    expectedFailures.handleTearDown()
  }

  function testPreventExpectedFailure() {
    expectedFailures.expectFailureFor(true);

    expectedFailures.handleException(new goog.testing.JsUnitException('', ''));
    assertEquals('Should have logged a message', 1, count);
    assertEquals('Should have logged an info message',
        goog.debug.Logger.Level.INFO, lastLevel);
    assertContains('Should log a suppression message',
        'Suppressing test failure', lastMessage);

    expectedFailures.handleTearDown();
    assertEquals('Should not have logged another message', 1, count);
  }

  function testDoNotPreventException() {
    var ex = 'exception';
    expectedFailures.expectFailureFor(false);
    var e = assertThrows('Should have rethrown exception', function() {
      expectedFailures.handleException(ex);
    });
    assertEquals('Should rethrow same exception', ex, e);
  }

  function testExpectedFailureDidNotOccur() {
    expectedFailures.expectFailureFor(true);

    expectedFailures.handleTearDown();
    assertEquals('Should have logged a message', 1, count);
    assertEquals('Should have logged a warning',
        goog.debug.Logger.Level.WARNING, lastLevel);
    assertContains('Should log a suppression message',
        'Expected a test failure', lastMessage);
  }

  function testRun() {
    expectedFailures.expectFailureFor(true);

    expectedFailures.run(function() {
      fail('Expected failure');
    });

    assertEquals('Should have logged a message', 1, count);
    assertEquals('Should have logged an info message',
        goog.debug.Logger.Level.INFO, lastLevel);
    assertContains('Should log a suppression message',
        'Suppressing test failure', lastMessage);

    expectedFailures.handleTearDown();
    assertEquals('Should not have logged another message', 1, count);
  }

  function testRunStrict() {
    expectedFailures.expectFailureFor(true);

    var ex = assertThrows(function() {
      expectedFailures.run(function() {
        // Doesn't fail!
      });
    });
    assertContains(
        "Expected a test failure in 'testRunStrict' but the test passed.",
        ex.message);
  }

  function testRunLenient() {
    expectedFailures.expectFailureFor(true);

    expectedFailures.run(function() {
      // Doesn't fail!
    }, true);
    expectedFailures.handleTearDown();
    assertEquals('Should have logged a message', 1, count);
    assertEquals('Should have logged a warning',
        goog.debug.Logger.Level.WARNING, lastLevel);
    assertContains('Should log a suppression message',
        'Expected a test failure', lastMessage);
  }

</script>
</body>
</html>